In this type of NAT, only the IP addresses, IP header checksum, and any higher-level checksums that include the IP address are changed. RFC 2663 refers to this type of NAT as basic NAT it is also called a one-to-one NAT. The simplest type of NAT provides a one-to-one translation of IP addresses (RFC 1631). The 19 describes NAT as a 'short-term solution' to the two most compelling problems facing the IP Internet at that time: IP address depletion and scaling in routing.

By 1992 it became evident that that would not be enough. IPv4 uses 32-bit addresses, capable of uniquely addressing about 4.4 billion devices. The specifics of NAT behavior are not commonly documented by vendors of equipment containing NAT implementations. Īs network address translation modifies the IP address information in packets, NAT implementations may vary in their specific behavior in various addressing cases and their effect on network traffic. One Internet-routable IP address of a NAT gateway can be used for an entire private network. It has become a popular and essential tool in conserving global address space in the face of IPv4 address exhaustion. The technique was originally used to bypass the need to assign a new address to every host when a network was moved, or when the upstream Internet service provider was replaced, but could not route the network's address space. Network address translation ( NAT) is a method of mapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. Network address translation between a private network and the Internet

Protocol facilitating connection of one IP address space to another

Port forwarding network utilities crack